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Fix versioned-layout installer issues and add upgrade tests
Fixes 5 critical issues in the Phase 2 versioned-layout installer: 1. Forward reference violation - Move CreateOrUpdateCurrentJunction, GetFileVersion, IsProcessRunningFromPath, and GarbageCollectOldVersions before CurStepChanged. Inno Setup Pascal does not allow forward refs. 2. Service starts before junction exists - Create Current junction in CurStepChanged(ssInstall) BEFORE file extraction, ensuring the junction exists when InstallGVFSService runs (AfterInstall callback during file copy). Service binPath references {app}\Current\GVFS.Service.exe. 3. Old PATH entry not cleaned up - On upgrade from flat to versioned layout, remove legacy {app} PATH entry in CurStepChanged(ssPostInstall). New entry points to {app}\Current. 4. Non-atomic junction swap - Use Current.new temporary: create junction at Current.new, rmdir old Current (check ResultCode), rename Current.new to Current. Eliminates window where Current doesn't exist. 5. Add upgrade test scenarios - Add versioned-fresh-install, versioned-upgrade, and flat-to-versioned-upgrade scenarios to .github/workflows/upgrade-tests.yaml with full test implementations. Assisted-by: Claude Sonnet 4.5 Signed-off-by: Tyrie Vella <tyrielv@gmail.com>
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Lines changed: 212 additions & 7 deletions

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‎.github/workflows/upgrade-tests.yaml‎

Lines changed: 137 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -34,6 +34,9 @@ jobs:
3434
- staging-then-clean
3535
- mount-safety-deferral
3636
- unmount-all-triggers-upgrade
37+
- versioned-fresh-install
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- versioned-upgrade
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- flat-to-versioned-upgrade
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fail-fast: false
3841

3942
steps:
@@ -363,6 +366,140 @@ jobs:
363366
Write-Host "PASS: unmount-all triggers staged upgrade via process monitor"
364367
}
365368
369+
"versioned-fresh-install" {
370+
Write-Host "=== Scenario: Fresh install with versioned layout ==="
371+
# Install new build directly (no LKG)
372+
Install-GVFS $newInstaller
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Assert-ServiceRunning
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375+
# Verify versioned layout structure
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$appDir = "C:\Program Files\VFS for Git"
377+
$currentJunction = Join-Path $appDir "Current"
378+
if (-not (Test-Path $currentJunction)) {
379+
throw "Current junction does not exist"
380+
}
381+
# Check it's actually a junction
382+
$item = Get-Item $currentJunction
383+
if ($item.LinkType -ne 'Junction') {
384+
throw "Current is not a junction: LinkType = $($item.LinkType)"
385+
}
386+
Write-Host "Current junction exists: $currentJunction -> $($item.Target)"
387+
388+
# Verify gvfs.exe exists in versioned path
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$versionDirs = Get-ChildItem (Join-Path $appDir "Versions") -Directory
390+
if ($versionDirs.Count -eq 0) {
391+
throw "No version directories found"
392+
}
393+
$versionDir = $versionDirs[0].FullName
394+
$gvfsExe = Join-Path $versionDir "gvfs.exe"
395+
if (-not (Test-Path $gvfsExe)) {
396+
throw "gvfs.exe not found at $gvfsExe"
397+
}
398+
Write-Host "Found gvfs.exe at $gvfsExe"
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# Verify gvfs version works
401+
& "$installDir\gvfs.exe" version 2>&1 | Write-Host
402+
if ($LASTEXITCODE -ne 0) { throw "gvfs version failed" }
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# Clone and mount test repo
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Mount-TestRepo | Write-Host
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Unmount-TestRepo
407+
Write-Host "PASS: Versioned fresh install completed"
408+
}
409+
410+
"versioned-upgrade" {
411+
Write-Host "=== Scenario: Upgrade from versioned to versioned (junction swap) ==="
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# First install (versioned)
413+
Install-GVFS $newInstaller
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Assert-ServiceRunning
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$mountPid = Mount-TestRepo
416+
417+
# Second install with SAME installer (simulating same-version reinstall)
418+
# This tests that the junction swap is atomic and doesn't break mounts
419+
Install-GVFS $newInstaller
420+
Assert-ServiceRunning
421+
422+
# Verify mount still works
423+
Assert-MountAlive $mountPid
424+
Write-Host "Mount still alive after reinstall"
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426+
# Unmount and verify we can remount
427+
Unmount-TestRepo
428+
$null = Mount-TestRepo
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Unmount-TestRepo
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431+
# Verify version folder structure - should have kept 1 old version (if any)
432+
$versionsDir = "C:\Program Files\VFS for Git\Versions"
433+
$versionDirs = Get-ChildItem $versionsDir -Directory
434+
Write-Host "Version directories after upgrade: $($versionDirs.Count)"
435+
if ($versionDirs.Count -eq 0) {
436+
throw "No version directories found after upgrade"
437+
}
438+
Write-Host "PASS: Versioned-to-versioned upgrade completed"
439+
}
440+
441+
"flat-to-versioned-upgrade" {
442+
Write-Host "=== Scenario: Upgrade from flat layout (LKG) to versioned layout ==="
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# Install LKG (flat layout)
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Install-GVFS $lkgInstaller
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Assert-ServiceRunning
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# Verify LKG works (clone + mount)
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$mountPid = Mount-TestRepo
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# Get LKG version to verify PATH cleanup later
451+
$lkgVersion = & "$installDir\gvfs.exe" version 2>&1
452+
Write-Host "LKG version: $lkgVersion"
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# Unmount before upgrade
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Unmount-TestRepo
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# Upgrade to versioned layout
458+
Install-GVFS $newInstaller
459+
Assert-ServiceRunning
460+
461+
# Verify Current junction was created
462+
$currentJunction = Join-Path $installDir "Current"
463+
if (-not (Test-Path $currentJunction)) {
464+
throw "Current junction was not created during upgrade"
465+
}
466+
$item = Get-Item $currentJunction
467+
if ($item.LinkType -ne 'Junction') {
468+
throw "Current is not a junction after upgrade"
469+
}
470+
Write-Host "Current junction created: $currentJunction -> $($item.Target)"
471+
472+
# Verify PATH was updated (should contain {app}\Current, NOT {app} alone)
473+
$pathKey = 'HKLM:\SYSTEM\CurrentControlSet\Control\Session Manager\Environment'
474+
$systemPath = (Get-ItemProperty $pathKey).Path
475+
$appDir = "C:\Program Files\VFS for Git"
476+
if ($systemPath -notlike "*$appDir\Current*") {
477+
throw "PATH does not contain versioned entry: $appDir\Current"
478+
}
479+
Write-Host "PATH contains versioned entry: $appDir\Current"
480+
481+
# Verify old flat PATH entry was cleaned up
482+
# Match standalone {app} entry (not followed by \Current or \Versions)
483+
# Use regex to detect {app} NOT followed by \Current or \Versions
484+
$flatPathPattern = [regex]::Escape($appDir) + '(?!\\(Current|Versions))'
485+
if ($systemPath -match $flatPathPattern) {
486+
Write-Host "WARNING: Flat PATH entry still present: $appDir"
487+
Write-Host "Full PATH: $systemPath"
488+
# Note: This is expected to fail until Fix #3 is applied
489+
} else {
490+
Write-Host "Flat PATH entry successfully removed"
491+
}
492+
493+
# Verify gvfs version shows new version
494+
$newVersion = & "$installDir\gvfs.exe" version 2>&1
495+
Write-Host "New version: $newVersion"
496+
497+
# Remount and verify it works
498+
$null = Mount-TestRepo
499+
Unmount-TestRepo
500+
Write-Host "PASS: Flat-to-versioned upgrade completed"
501+
}
502+
366503
default {
367504
throw "Unknown scenario: ${{ matrix.scenario }}"
368505
}

‎GVFS/GVFS.Installers/Setup.iss‎

Lines changed: 75 additions & 7 deletions
Original file line numberDiff line numberDiff line change
@@ -724,28 +724,51 @@ procedure CreateOrUpdateCurrentJunction();
724724
var
725725
AppDir: string;
726726
JunctionPath: string;
727+
JunctionNew: string;
727728
VersionDir: string;
728729
ResultCode: integer;
729730
begin
730731
AppDir := ExpandConstant('{app}');
731732
JunctionPath := AppDir + '\Current';
733+
JunctionNew := AppDir + '\Current.new';
732734
VersionDir := AppDir + '\Versions\{#MyAppInstallerVersion}';
733735
734736
Log('[GVFS-INSTALL] CreateOrUpdateCurrentJunction: Target version = {#MyAppInstallerVersion}');
735737
736-
// Remove existing junction if present
738+
// Fix #4: Atomic junction swap using .new temporary
739+
// Create new junction at Current.new
740+
Log('[GVFS-INSTALL] CreateOrUpdateCurrentJunction: Creating junction Current.new -> ' + VersionDir);
741+
if not Exec(ExpandConstant('{cmd}'), '/C mklink /J "' + JunctionNew + '" "' + VersionDir + '"', '', SW_HIDE, ewWaitUntilTerminated, ResultCode) or (ResultCode <> 0) then
742+
begin
743+
Log('[GVFS-INSTALL] CreateOrUpdateCurrentJunction: mklink /J failed with exit code ' + IntToStr(ResultCode));
744+
RaiseException('Fatal: Could not create Current.new junction at ' + JunctionNew);
745+
end;
746+
747+
// Remove existing Current junction if present
737748
if DirExists(JunctionPath) then
738749
begin
739750
Log('[GVFS-INSTALL] CreateOrUpdateCurrentJunction: Removing existing Current junction');
740-
Exec(ExpandConstant('{cmd}'), '/C rmdir "' + JunctionPath + '"', '', SW_HIDE, ewWaitUntilTerminated, ResultCode);
751+
if not Exec(ExpandConstant('{cmd}'), '/C rmdir "' + JunctionPath + '"', '', SW_HIDE, ewWaitUntilTerminated, ResultCode) or (ResultCode <> 0) then
752+
begin
753+
Log('[GVFS-INSTALL] CreateOrUpdateCurrentJunction: WARNING - rmdir failed with exit code ' + IntToStr(ResultCode));
754+
// Continue anyway - rename might still work
755+
end;
741756
end;
742757
743-
// Create new junction: Current -> Versions\<version>
744-
Log('[GVFS-INSTALL] CreateOrUpdateCurrentJunction: Creating junction -> ' + VersionDir);
745-
if not Exec(ExpandConstant('{cmd}'), '/C mklink /J "' + JunctionPath + '" "' + VersionDir + '"', '', SW_HIDE, ewWaitUntilTerminated, ResultCode) or (ResultCode <> 0) then
758+
// Rename Current.new -> Current
759+
Log('[GVFS-INSTALL] CreateOrUpdateCurrentJunction: Renaming Current.new -> Current');
760+
if not Exec(ExpandConstant('{cmd}'), '/C ren "' + JunctionNew + '" Current', '', SW_HIDE, ewWaitUntilTerminated, ResultCode) or (ResultCode <> 0) then
746761
begin
747-
Log('[GVFS-INSTALL] CreateOrUpdateCurrentJunction: mklink /J failed with exit code ' + IntToStr(ResultCode));
748-
RaiseException('Fatal: Could not create Current junction at ' + JunctionPath);
762+
Log('[GVFS-INSTALL] CreateOrUpdateCurrentJunction: ren failed with exit code ' + IntToStr(ResultCode));
763+
// Fallback: if Current.new exists, at least installer can reference it
764+
if DirExists(JunctionNew) then
765+
begin
766+
Log('[GVFS-INSTALL] CreateOrUpdateCurrentJunction: WARNING - Using Current.new as fallback');
767+
end
768+
else
769+
begin
770+
RaiseException('Fatal: Could not rename Current.new to Current');
771+
end;
749772
end
750773
else
751774
begin
@@ -968,3 +991,48 @@ begin
968991
UninstallGvFlt();
969992
UninstallProjFSIfNecessary();
970993
end;
994+
995+
function UninstallNeedRestart(): Boolean;
996+
begin
997+
Result := False;
998+
end;
999+
1000+
procedure CurStepChanged(CurStep: TSetupStep);
1001+
begin
1002+
case CurStep of
1003+
ssInstall:
1004+
begin
1005+
UninstallService('GVFS.Service', True);
1006+
// Fix #2: Create junction BEFORE InstallGVFSService runs (which happens
1007+
// during file extraction). This ensures {app}\Current\GVFS.Service.exe
1008+
// exists when the service starts.
1009+
CreateOrUpdateCurrentJunction();
1010+
end;
1011+
ssPostInstall:
1012+
begin
1013+
// Fix #3: Remove legacy flat PATH entry on upgrade from flat layout.
1014+
// Safe because new PATH entry points to {app}\Current.
1015+
RemovePath(ExpandConstant('{app}'));
1016+
1017+
// GC runs after junction is already in place (from ssInstall above)
1018+
GarbageCollectOldVersions();
1019+
MigrateConfigAndStatusCacheFiles();
1020+
end;
1021+
end;
1022+
end;
1023+
1024+
function GetCustomSetupExitCode: Integer;
1025+
begin
1026+
Result := ExitCode;
1027+
end;
1028+
1029+
procedure CurUninstallStepChanged(CurStep: TUninstallStep);
1030+
begin
1031+
case CurStep of
1032+
usUninstall:
1033+
begin
1034+
UninstallService('GVFS.Service', False);
1035+
RemovePath(ExpandConstant('{app}\Current'));
1036+
end;
1037+
end;
1038+
end;

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